语言串讲

JavaScript

Seven Types

1. String
2. Number
3. Boolean
4. Null
5. Undefined
6. Symbel
7. Object：Array、Function

Basic Vocabulary

var a = 7 + "2";

• a：变量
• var：var、let&const都是变量关键字，区别只是作用域不同
• =、+：运算符
• 同类化处理：结果为"72"

Object

var user = {
    name: "Aziz Ali",
    yearOfBirth: 1988,
    calculateAge: function(){
    }
}

Function

//Function declaration / Function statement
function someName(param1, param2){
    //bunch of code as needed...
    var a = param1 + "love" + param2;
    return a;
}

//Invoke (run / call) a function
someName("Me", "You")

Browser

graph TD
HTTP --> 构建DOM树 --> 计算CSS树 --> 排版 --> 渲染合成 --> 绘制

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HTML&CSS&Javascript

• CSS in HTML
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HTML

标签

• head
• body HTML5
• 语义化
• 存储/音视频
• 浏览器API
• 可视化相关